Improved window-screen



D. N. HUR LBUT.

Window Screen. I

No. 99,197. Patented Jan. 25, 1870.

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Letters Patent N0. 99,197, dated January 25, 1870.

IMPROVED WINDOW-SCREEN.

I The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it knownthat I, DANIEL N. HURLBUT, of Ohicago, in the county of Cook, and State of Illinois, have invented a new and useful Improvement in Adjustable Window-Screens; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being bad to the accompanying drawings, and the letters and figures marked thereon, which form apart of this specification, and in which- Figure 1 represents a; side elevationof my windowscrcen, as it is placed in the window;

Figure 2 is an end view of the same;

Figure 3, a view of the other end of the screen;

Figure 4, an edge view;

Figure 5, a sectional view at the line x; and

Figure 6, an enlarged view of a portion of the section at the same line.

The nature of my invention consists in the novel construction of the metallic guide, hereafter fully described, and also in the combination of a spring and the adjustable cross-piece F, hereafter more fully described.

To enable those skilled in the art to understand how to manufacture and use my invention, I will proceed to describe the same with particularity.

The same letters of reference refer to the corresponding parts in the different figures.

I construct the window-screen in two parts, each part consisting of two frames, A and B, each being covered with wire gauze, or any suitable screen-cloth.

There are metallic strips C= secured to two edges of the frame A, and extending out from the frame the width of the frame B, with one edge turned over, as clearly shown, forming a guide for the frame B to slide [Ll].

The object of this construction is to admitof one frame sliding over the other, to adapt the width of the screen to the widths of different windows.

The two frames are held at the desired width by the thumb-screwsD, which pass through one frame against the other, and prevent the frames from sliding on each other.

E are steps extending through the frames, as shown, and may be pushed out so as to catch in the windowframe and hold the screen at any desired part of the frame. 7

There is also an adjustable cross-piece, F, that extends across the frame A, as shown, and is intended to be always kept in said frame, directly over the end piece H of theframe B, so that there may be no space between the end piece H of the frame B through which insects can pass.

In the patent granted to me June 1, 1869, the adjustable cross-piece F had a tenon on each end, which moved in grooves in the frame A, which are indicated in the annexed drawings by dotted lines, but I found that by actual use it was difficult to make all the crosspieces and frames so thatthe cross-piece would move readily, the frame would warp or spring, or would be made a little larger or smaller than the length of the cross-piece would fit, so that frequently the crosspieces would be so short that they would fall out, and frequently they would be immovable on account of .bindin g. e

To obviate these dilficnlties, instead of making a tenon on one end of the cross-piece, I use the spiral spring I, one end of which rests in a recess in one end of the cross-piece, while the other end of the spring rests in the groove J, in the frame. The spring causes the cross-piece to adapt itself to the variations in the sizes of the frames, and move readily to the position desired.

The metallic strip 0, as heretofore constructed, was liable to spring off from the frame B, which slid under, and the fastening which fastened it to the frame A was liable to become loose, and also it was so constructed that the frame B would slide out at either end of the strips, and if it were slid out at the end not intended, the set-screws would not fasten it.

To obviate these diflicultics, I make these metallic strips with a lip or projection, P, on each end, which is bent around the corner of the frame and securely fastened thereto, as clearly shown in figs. 2 and 3. At one end I cut them wide, so that they form stops to the frame B, as clearly shown in fig.- 2, and prevent it from being drawn out from these guides in only one direction. At the other'end they are cut narrower, and do not form as much of a brace to keep the strip from springing off as they do at the opposite end, and do not constitute a stop to the frame B, but they serve to bind the corners of the frame together, and keep the strip firmly fastened to the frame.

Having fully described the construction and operation of my improved window-screen,

What 1 claim, and desire to secure by Letters Patcut, is-

1. The spring I, in combination with the cross-piece F and screen-frames A and B, when constructed and operating substantially as and. for the purposes specified and shown.

2. The guide-strips 0, provided with the lips or projections P, in combination with the screen-frames A and B, when constructed and operating substantially as and for the purposes set forth.

' i DANIEL N. HURLBUT.

Witnesses:

L. L. GOBURN, Hams. BRUNS. 

